"He came after me, pretty much tackled me to the ground, and told me I was under arrest for a warrant that I did not have," she said.

Morris told the Arizona Daily Sun that she didn't assault the officer.

"I did not put my hands on him or hit him or strike him or kick him or anything of that manner," she told the Flagstaff-based newspaper. "I did nothing to abuse or hurt him. I was trying to protect myself."

CNN left a voice mail seeking comment at a phone number listed for Bonar.

Police say they became aware of the situation when video was posted on Facebook.

"I'm as concerned with what is depicted in the video as I know many others are," police Chief Kevin Treadway told reporters Thursday. "I have heard your concerns and the department is taking this incident very seriously."

Morris was booked Wednesday evening on suspicion of aggravated assault and resisting arrest.

The chief said that based on a booking photo and a jailhouse interview, Morris didn't have any injuries.

Flagstaff police policy says: "Officers shall use objectively reasonable force in response to resistance given the facts and circumstances perceived by the officer at the time of the event to accomplish a legitimate law enforcement purpose. Given that no policy can realistically predict every possible situation an officer might encounter, officers are entrusted to use well-reasoned discretion in determining the appropriate use of force in each incident."